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ARM: Virt: Use gpio_key for power button

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There is a problem for power button that it will not work if an early
system_powerdown request happens before guest gpio driver loads.

Fix this problem by using gpio_key.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Message-id: 1458221140-15232-3-git-send-email-zhaoshenglong@huawei.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Shannon Zhao 2016-03-30 17:27:22 +01:00 committed by Peter Maydell
parent e5a8152c9b
commit 94f02c5ea9
1 changed files with 5 additions and 2 deletions
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7
hw/arm/virt.c
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@ -582,11 +582,11 @@ static void create_rtc(const VirtBoardInfo *vbi, qemu_irq *pic)
g_free(nodename);
}
static DeviceState *pl061_dev;
static DeviceState *gpio_key_dev;
static void virt_powerdown_req(Notifier *n, void *opaque)
{
/* use gpio Pin 3 for power button event */
qemu_set_irq(qdev_get_gpio_in(pl061_dev, 3), 1);
qemu_set_irq(qdev_get_gpio_in(gpio_key_dev, 0), 1);
}
static Notifier virt_system_powerdown_notifier = {
@ -596,6 +596,7 @@ static Notifier virt_system_powerdown_notifier = {
static void create_gpio(const VirtBoardInfo *vbi, qemu_irq *pic)
{
char *nodename;
DeviceState *pl061_dev;
hwaddr base = vbi->memmap[VIRT_GPIO].base;
hwaddr size = vbi->memmap[VIRT_GPIO].size;
int irq = vbi->irqmap[VIRT_GPIO];
@ -618,6 +619,8 @@ static void create_gpio(const VirtBoardInfo *vbi, qemu_irq *pic)
qemu_fdt_setprop_string(vbi->fdt, nodename, "clock-names", "apb_pclk");
qemu_fdt_setprop_cell(vbi->fdt, nodename, "phandle", phandle);
gpio_key_dev = sysbus_create_simple("gpio-key", -1,
qdev_get_gpio_in(pl061_dev, 3));
qemu_fdt_add_subnode(vbi->fdt, "/gpio-keys");
qemu_fdt_setprop_string(vbi->fdt, "/gpio-keys", "compatible", "gpio-keys");
qemu_fdt_setprop_cell(vbi->fdt, "/gpio-keys", "#size-cells", 0);